CN117734283B - Embroidery with PU layer and processing technology thereof - Google Patents
Embroidery with PU layer and processing technology thereofInfo
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- CN117734283B CN117734283B CN202311752371.0A CN202311752371A CN117734283B CN 117734283 B CN117734283 B CN 117734283B CN 202311752371 A CN202311752371 A CN 202311752371A CN 117734283 B CN117734283 B CN 117734283B
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Abstract
The application belongs to the technical field of spinning, and particularly discloses an embroidery with a PU layer and a processing technology thereof. The embroidery with the PU layer comprises a gauze layer and the PU layer, wherein the PU layer comprises, by weight, 60-80 parts of polyether polyol, 50-70 parts of 2, 4-toluene diisocyanate, 6-15 parts of vinyl trimethoxy silane, 25-35 parts of modified talcum powder, 13-20 parts of modified glass fiber, 7-13 parts of triacetin and 9-15 parts of graphene. The embroidery with the PU layer prepared by the application has higher mechanical strength, tearing resistance and elasticity, and is beneficial to the embroidery process in the follow-up process, so that the PU layer is not easy to tear due to the insertion or penetration of the needle and line.
Description
Technical Field
The application relates to the technical field of spinning, in particular to an embroidery with a PU layer and a processing technology thereof.
Background
The embroidery is a textile which is embroidered by manpower or machines, has artistic quality, ornamental value and practicability, can be planar or three-dimensional, can decorate walls, bedclothes, clothes, accessories and the like, and has wide application.
PU is polyurethane for short, has better appearance and hand feeling, fine and soft texture, better wear resistance and high temperature resistance, and is widely applied to the fields of machinery, automobiles, buildings, textiles, sports equipment, furniture and the like, wherein the PU film is widely applied to clothing as a protective layer of patterns due to better elasticity, air permeability and wear resistance, and is popular among people.
In the prior art, the PU film is fixed on the surface of the clothes in an embroidering way, so that the garment has good ornamental value and is protective, but the existing PU film is easy to tear due to the insertion or penetration of needle and line, and the subsequent embroidering process is affected.
Disclosure of Invention
In order to solve the problem that the conventional PU film is easy to tear due to the insertion or penetration of needle and threads, the application provides an embroidery with a PU layer and a processing technology thereof.
The application provides an embroidery with a PU layer, which adopts the following technical scheme:
The embroidery with the PU layer comprises a gauze layer and the PU layer, wherein the PU layer comprises, by weight, 60-80 parts of polyether polyol, 50-70 parts of 2, 4-toluene diisocyanate, 6-15 parts of vinyl trimethoxy silane, 25-35 parts of modified talcum powder, 13-20 parts of modified glass fiber, 7-13 parts of triacetin and 9-15 parts of graphene.
By adopting the technical scheme, the polyether polyol has higher toughness and strength, better film forming property, can form a uniform and compact film layer, can improve the fluidity, adhesiveness, chemical corrosion resistance, heat resistance and weather resistance of a system, further improves the comprehensive performance of the system, and can react with 2, 4-toluene diisocyanate to generate the polyurethane elastomer with high elasticity and excellent physical performance.
The modified talcum powder has good stability, wear resistance, toughness, strength and adsorptivity, can enhance the mechanical strength of a system, the modified glass fiber has good tensile strength, ductility, compressive strength and rigidity, a three-dimensional net structure can be formed in the system, the cohesive force and bending rigidity of the system are increased, the graphene has good mechanical property, ductility and chemical resistance, the elasticity, crack resistance and tear resistance of the system can be improved, the modified talcum powder can be loaded on the surface of the graphene, the graphene can be loaded on the surface of the modified glass fiber, the modified talcum powder, the modified glass fiber and the graphene are mutually matched, the mechanical property of the system is improved, the prepared PU layer has good mechanical strength and tear resistance, the subsequent embroidery process is facilitated, and the needle and line can be inserted or penetrated into the PU layer, and the PU layer is not easy to tear.
Preferably, the mass ratio of the modified talcum powder to the modified glass fiber to the graphene is 2.1-3.2:1.2-2.2:1.
By adopting the technical scheme, the mass ratio of the modified talcum powder, the modified glass fiber and the graphene is further limited, the composition with good mechanical strength and tearing resistance is obtained, the modified talcum powder can be loaded on the surface of the graphene, the graphene loaded with the modified talcum powder can be loaded on the surface of the modified glass fiber, the modified talcum powder, the modified glass fiber and the graphene are mutually matched, the synergistic effect is achieved, the mechanical property of the PU layer is improved together, the follow-up embroidery is facilitated, and the polyurethane is not easy to crack.
Preferably, the preparation method of the modified talcum powder comprises the following steps:
(1) Grinding talcum powder, dispersing in deionized water, adding a silane coupling agent, stirring for 30-40min at 78-82 ℃, filtering, and drying to obtain a mixture I;
(2) Dispersing chitosan fiber in 2-3% citric acid solution, stirring at 65-70deg.C for 10-20min, filtering, and drying to obtain a second mixture;
(3) Dispersing the mixture I in the step (1) in deionized water, adding the mixture II in the step (2), adding pectin, stirring for 1-2h at 85-90 ℃, filtering, and drying to obtain the modified talcum powder.
By adopting the technical scheme, talcum powder is firstly ground to obtain powder, and silane coupling agent is added for stirring, so that the interaction force of the talcum powder and other components is increased, the talcum powder is more uniformly dispersed, the agglomeration of the talcum powder is reduced, and the stability and consistency of a system are improved.
The chitosan fiber has stronger ductility, toughness and biocompatibility, and the chitosan fiber is mixed with citric acid, so that chitosan macromolecules contact citric acid molecules, and the citric acid and amino groups on the chitosan are subjected to ionic crosslinking and chemical crosslinking, so that the mechanical property of the chitosan fiber is improved.
The mixture I in the step (1) and the mixture II in the step (2) are mixed and stirred, the treated chitosan fibers can be loaded on the surface of the treated talcum powder, the mechanical property of the talcum powder is enhanced, pectin coats the talcum powder, the viscosity between the talcum powder and the chitosan fibers is increased, the chitosan fibers are more stably loaded on the surface of the chitosan fibers, the mechanical stability of the talcum powder is further increased, and the subsequent improvement of the mechanical property of a system is facilitated.
Preferably, the mass ratio of the talcum powder to the chitosan fiber to the pectin is 1:0.2-0.5:0.07-0.09.
By adopting the technical scheme, the mass ratio of the talcum powder, the chitosan fiber and the pectin is further limited within a certain range, the mechanical strength and the tearing resistance of the talcum powder are improved, the chitosan fiber is loaded on the surface of the talcum powder, and the pectin increases the viscosity between the talcum powder and the chitosan fiber, so that the related performance of the talcum powder is improved, and the talcum powder is subsequently applied to the PU layer and has higher mechanical modification.
Preferably, the mass ratio of the talcum powder to the silane coupling agent is 1:0.3-0.6.
By adopting the technical scheme, the mass ratio of the talcum powder to the silane coupling agent is further limited within a certain range, the talcum powder and the silane coupling agent are mixed for reaction, the interaction force of the talcum powder and other components is increased, the talcum powder is more uniformly dispersed, the agglomeration of the talcum powder is reduced, the stability and consistency of a system are improved, and the subsequent mixing modification of the talcum powder and other components is facilitated.
Preferably, the preparation method of the modified glass fiber comprises the following steps:
(1) Dispersing glass fiber in potassium permanganate solution, stirring for 10-20min, washing with water, dispersing in sodium hydroxide solution, washing with water, filtering, and drying to obtain treated glass fiber;
(2) Grinding and sieving the ceramic powder, dispersing in ammonia water, washing with water, and filtering to obtain treated ceramic powder;
(3) Dispersing the glass fiber treated in the step (1) in deionized water, adding the ceramic powder treated in the step (2), stirring for 1-2h at 75-80 ℃, adding nano cellulose, continuously stirring, filtering, and drying to obtain the modified glass fiber.
By adopting the technical scheme, the glass fiber and the potassium permanganate solution are mixed, and the potassium permanganate solution carries out certain degree of degradation on the surface of the glass fiber, so that the surface of the glass fiber becomes concave-convex porous, the specific surface area of the glass fiber is increased, then the glass fiber is dispersed in the sodium hydroxide solution, the sodium hydroxide solution further degrades the surface of the glass fiber, the surface porous structure of the surface of the glass fiber is further improved, and the specific surface area of the glass fiber is further improved.
The ceramic powder has a breathable microporous structure, has good hardness, wear resistance and corrosion resistance, is treated by ammonia water, organic impurities on the surface of the ceramic powder are removed, the specific surface area of the ceramic powder is increased, the ceramic powder is mixed with glass fibers, the ceramic powder can be loaded in the pore structure of the glass fibers, the mechanical strength of the glass fibers is increased, the nanocellulose has certain viscosity, the adhesiveness between the ceramic powder and the glass fibers can be increased, the ceramic powder is stably loaded on the surface of the glass fibers, the mechanical property stability of the glass fibers is further improved, and the performance of a subsequent glass fiber modified PU layer is facilitated.
Preferably, the mass ratio of the glass fiber to the ceramic powder to the nanocellulose is 1:0.4-0.8:0.03-0.06.
By adopting the technical scheme, the mass ratio of the glass fiber, the ceramic powder and the nanocellulose is further limited within a certain range, the mechanical strength, the wear resistance and the tearing resistance of the glass fiber are improved, the ceramic powder can be loaded on the surface of the glass fiber, the nanocellulose can coat the glass fiber, the adhesiveness between the glass fiber and the ceramic powder is further improved, and the subsequent PU layer corresponding performance is improved.
Preferably, the stirring speed is 1200-1300r/min.
By adopting the technical scheme, the stirring speed is further limited, so that all the components are uniformly mixed, and further the performance stability of the system is improved.
In a second aspect, the application provides a processing technology of an embroidery with a PU layer, comprising the following steps:
the preparation of the PU layer comprises the steps of mixing polyether polyol, 2, 4-toluene diisocyanate, vinyl trimethoxy silane, modified talcum powder, modified glass fiber, triacetin and graphene, stirring for 2-3 hours at 70-75 ℃ to obtain a mixture, and then carrying out blade coating to obtain a PU film;
And fixing the gauze layer, covering the PU layer on the upper side of the gauze layer, then embroidering, embroidering the PU layer on the gauze layer by adopting embroidery threads, and removing the redundant PU layer by adopting laser to obtain the embroidery with the PU layer.
By adopting the technical scheme, the embroidery with the PU layer obtained by adopting the method has better comprehensive performance, can achieve the visual effect of wrinkles on one hand, and can achieve the fixation of the PU layer on the other hand, and the obtained embroidery has better softness, air permeability and bending resistance.
Preferably, the thickness of the PU layer is 0.1-0.2mm.
By adopting the technical scheme, the thickness of the PU layer is further limited, the comprehensive properties such as the mechanical property of the PU layer are ensured, and the prepared embroidery is soft and breathable.
In summary, the application has the following beneficial effects:
1. The polyether polyol has higher toughness and strength, has better film forming property, can form a uniform and compact film layer, can improve the fluidity, adhesiveness, chemical corrosion resistance, heat resistance and weather resistance of a system, further improves the comprehensive performance of the system, and can react with 2, 4-toluene diisocyanate to generate the polyurethane elastomer with high elasticity and excellent physical performance.
2. The modified talcum powder has good stability, wear resistance, toughness, strength and adsorptivity, can enhance the mechanical strength of a system, has good tensile strength, ductility, compressive strength and rigidity, can form a three-dimensional network structure in the system, increases the cohesive force and bending rigidity of the system, has good mechanical property, ductility and chemical resistance, and can improve the elasticity, crack resistance and tearing resistance of the system.
3. According to the application, the modified talcum powder can be loaded on the surface of the graphene, the graphene can be loaded on the surface of the modified glass fiber, the modified talcum powder, the modified glass fiber and the graphene are mutually matched, so that the mechanical property of a system is improved, the prepared PU layer has good mechanical strength and tear resistance, the embroidery process is facilitated subsequently, and the needle and line are inserted or penetrated into the PU layer, so that the PU layer is not easy to tear.
Detailed Description
The present application will be described in further detail with reference to examples.
The raw materials used in examples and comparative examples are all commercially available.
Preparation example of modified Talc powder
PREPARATION EXAMPLE 1-1
The preparation method of the modified talcum powder comprises the following steps:
(1) Grinding 1.2kg of talcum powder, dispersing in 2.1L of deionized water, adding a silane coupling agent, stirring for 35min at 80 ℃, filtering and drying to obtain a mixture I;
(2) Dispersing chitosan fibers in 1.3L of citric acid solution with the mass concentration of 2%, stirring for 15min at 67 ℃, filtering, and drying to obtain a mixture II;
(3) Dispersing the mixture I in the step (1) in 3L of deionized water, adding the mixture II in the step (2), adding pectin, stirring for 1.5h at 88 ℃, filtering, and drying to obtain the modified talcum powder.
Wherein the mass ratio of talcum powder to chitosan fiber to pectin is 1:0.2:0.09.
The mass ratio of talcum powder to silane coupling agent is 1:0.6.
PREPARATION EXAMPLES 1-2
The difference from preparation example 1-1 is that in step (1), a silane coupling agent is not added.
Preparation examples 1 to 3
The difference from preparation example 1-1 is that in step (2), no chitosan fiber was added.
Preparation examples 1 to 4
The difference from preparation example 1-1 is that pectin is not added in step (3).
Preparation examples 1 to 5
The difference from preparation example 1-1 is that the mass ratio of talc, chitosan fiber and pectin is 1:0.5:0.07.
Preparation examples 1 to 6
The difference from preparation example 1-1 is that the mass ratio of talc, chitosan fiber and pectin is 1:0.8:0.01.
Preparation examples 1 to 7
The difference from preparation example 1-1 is that the mass ratio of talc to silane coupling agent is 1:0.3.
Preparation examples 1 to 8
The difference from preparation example 1-1 is that the mass ratio of talc to silane coupling agent is 1:0.9.
Preparation example of modified glass fiber
PREPARATION EXAMPLE 2-1
The preparation method of the modified glass fiber comprises the following steps:
(1) Dispersing 1.3kg of glass fiber in 2L of 12% potassium permanganate solution, stirring for 15min, washing with water, dispersing in 2.1L of 8% sodium hydroxide solution, washing with water, filtering, and drying to obtain treated glass fiber;
(2) Grinding ceramic powder, sieving with a 20-mesh sieve, dispersing in 1.5L of 7% ammonia water, washing with water, and filtering to obtain treated ceramic powder;
(3) Dispersing the glass fiber treated in the step (1) in 2.1L of deionized water, adding the ceramic powder treated in the step (2), stirring for 1.5h at the temperature of 78 ℃, adding the nanocellulose, continuously stirring, filtering, and drying to obtain the modified glass fiber.
The mass ratio of the glass fiber to the ceramic powder to the nanocellulose is 1:0.8:0.03.
The stirring rate was 1200r/min.
PREPARATION EXAMPLE 2-2
The difference from preparation example 2-1 is that ceramic powder was not added in step (2).
PREPARATION EXAMPLES 2-3
The difference from preparation example 2-1 is that nanocellulose is not added in step (3).
PREPARATION EXAMPLES 2 to 4
The difference from preparation example 2-1 is that the stirring rate was 1300r/min.
PREPARATION EXAMPLES 2 to 5
The difference from preparation example 2-1 is that the mass ratio of glass fiber, ceramic powder and nanocellulose is 1:0.4:0.06.
Preparation examples 2 to 6
The difference from preparation example 2-1 is that the mass ratio of glass fiber, ceramic powder and nanocellulose is 1:0.1:0.09.
Examples
Example 1
The embroidery with the PU layer comprises the following raw materials, by weight, 60kg of polyether polyol, 70kg of 2, 4-toluene diisocyanate, 15kg of vinyl trimethoxysilane, 35kg of modified talcum powder, 20kg of modified glass fiber, 13kg of triacetin and 9kg of graphene.
The processing technology of the embroidery with the PU layer comprises the following steps of preparing the PU layer, namely mixing polyether polyol, 2, 4-toluene diisocyanate, vinyl trimethoxy silane, modified talcum powder, modified glass fiber, triacetin and graphene, stirring for 3 hours at 75 ℃ to obtain a mixture, and then carrying out blade coating to obtain a PU film;
Fixing the gauze layer, covering the PU layer on the upper side of the gauze layer, embroidering the PU layer on the gauze layer by adopting embroidery threads, and removing the redundant PU layer by adopting laser to obtain the embroidery with the PU layer, wherein the thickness of the PU layer is 0.1-0.2mm.
Modified talcum powder is prepared by adopting a preparation example 1-1, and modified glass fiber is prepared by adopting a preparation example 2-1.
Example 2
The embroidery with PU layer is different from example 1 in that the embroidery comprises 80kg of polyether polyol, 50kg of 2, 4-toluene diisocyanate, 6kg of vinyl trimethoxy silane, 25kg of modified talcum powder, 13kg of modified glass fiber, 7kg of triacetin and 15kg of graphene.
Example 3
An embroidery with a PU layer differs from example 1 in that modified talc was prepared by using preparation examples 1-2.
Example 4
An embroidery with a PU layer differs from example 1 in that modified talc was prepared using preparation examples 1-3.
Example 5
An embroidery with a PU layer differs from example 2 in that modified talc was prepared using preparation examples 1 to 4.
Example 6
An embroidery with a PU layer differs from example 2 in that modified talc was prepared using preparation examples 1 to 5.
Example 7
An embroidery with a PU layer differs from example 2 in that modified talc was prepared using preparation examples 1 to 6.
Example 8
An embroidery with a PU layer differs from example 2 in that modified talc was prepared using preparation examples 1 to 7.
Example 9
An embroidery with a PU layer differs from example 2 in that modified talc was prepared using preparation examples 1 to 8.
Example 10
An embroidery with a PU layer is different from example 2 in that modified glass fiber is produced by using preparation example 2-2.
Example 11
An embroidery with a PU layer differs from example 1 in that modified glass fibers were produced using preparation examples 2 to 3.
Example 12
An embroidery with a PU layer differs from example 1 in that modified glass fibers were produced using preparation examples 2 to 4.
Example 13
An embroidery with a PU layer differs from example 1 in that modified glass fibers were produced using preparation examples 2 to 5.
Example 14
An embroidery with a PU layer differs from example 1 in that modified glass fibers were produced using preparation examples 2 to 6.
Example 15
An embroidery with a PU layer differs from example 1 in that the mass ratio of modified talc powder, modified glass fibers and graphene is 2.1:1.2:1.
Example 16
An embroidery with a PU layer differs from example 1 in that the mass ratio of modified talc powder, modified glass fibers and graphene is 3.2:2.2:1.
Comparative example
Comparative example 1
An embroidery with a PU layer differs from example 1 in that modified talc is not added.
Comparative example 2
An embroidery with a PU layer differs from example 1 in that the modified talc is replaced by an equivalent amount of talc.
Comparative example 3
An embroidery with a PU layer differs from example 1 in that no modified glass fibers are added.
Comparative example 4
An embroidery with a PU layer differs from example 1 in that the modified glass fibers are replaced with equal amounts of glass fibers.
Comparative example 5
An embroidery with a PU layer differs from example 1 in that no graphene is added.
Performance test
Carrying out mechanical property test on the PU-carrying layers prepared in application examples 1-16 and application comparative examples 1-5;
determining the hardness of the PU layer according to GB/T6739-2006;
The scratch resistance of the PU layer is measured by placing sand paper on the surface of the PU layer and loading different loads on the sand paper so as to obtain the minimum mass of obvious scratches;
The wear resistance of the protective film was determined by the average mass lost per 1000 revolutions of wear on a frictional wear tester;
tensile Strength was measured with reference to GB/T1040.3-2006, elongation at break according to GB/T1040, tear Strength according to GB/T529, and the test results are shown in Table 1.
Table 1 test data for examples and comparative examples
As can be seen from Table 1, the PU layers prepared in examples 1-2, 6, 8 and 12-13 of the present application have excellent mechanical properties and mechanical strength, wherein the pencil hardness of example 1 is 5H, scratch resistance is 82g, abrasion resistance is 0.2mg, tensile strength is 58N/mm 2, tear strength is 51N/mm 2, and elongation at break is 190%, which indicates that the PU layer prepared in the present application has excellent abrasion resistance, scratch resistance, tensile strength, tear strength and elongation at break, so that the PU layer has long service life, reduces the probability of tearing, and is helpful for embroidery process in the following steps.
As can be seen from Table 1, compared with example 1, the modified talc powder of example 3 has a pencil hardness of 5H, scratch resistance of 78g, abrasion resistance of 0.3mg, tensile strength of 53N/mm 2, tear strength of 47N/mm 2 and elongation at break of 185%, and the addition of the silane coupling agent for stirring increases the interaction force between the talc powder and other components, makes the talc powder dispersed more uniformly, reduces agglomeration of the talc powder, and improves the stability and consistency of the system.
As can be seen from table 1, compared with example 1, the modified talc powder of example 4 was prepared without adding chitosan fiber, and had pencil hardness of 4H, scratch resistance of 73g, abrasion resistance of 0.5mg, tensile strength of 47N/mm 2, tear strength of 41N/mm 2, and elongation at break of 179%, which indicated that the chitosan fiber had stronger ductility, toughness and biocompatibility, and subsequently contributed to improvement of the corresponding properties of talc powder.
As can be seen from Table 1, compared with example 1, the modified talc powder of example 5 has a pencil hardness of 5H, scratch resistance of 77g, abrasion resistance of 0.3mg, tensile strength of 52N/mm 2, tear strength of 46N/mm 2, and elongation at break of 183%, which indicates that pectin coats the talc powder, increases the viscosity between the talc powder and chitosan fibers, increases the mechanical stability of the talc powder, and contributes to subsequent improvement of mechanical properties of the system.
As can be seen from table 1, the modified mass ratio of talc powder, chitosan fiber and pectin in example 7 is significantly better than that in example 1 in terms of scratch resistance, tensile strength, tear strength and elongation at break, but is worse than that in examples 4 and 5, but is worse than that in examples 1 and 6, which shows that chitosan fiber is loaded on the surface of talc powder, pectin increases the viscosity between talc powder and chitosan fiber, further improves the correlation properties of talc powder, and has higher mechanical modification when being subsequently applied in PU layer.
Example 9 changing the mass ratio of talc to silane coupling agent, it can be seen from table 1 that the scratch resistance, tensile strength, tear strength and elongation at break properties are significantly better than those of example 3, but worse than those of example 1 and example 8, showing that the mixing of talc and silane coupling agent reacts, increasing the interaction force of talc and other components, making the talc more uniform in dispersion, reducing agglomeration of talc, improving the stability and consistency of the system, and facilitating the subsequent mixing modification of talc and other components.
As can be seen from Table 1, compared with example 1, the modified glass fiber of example 10 has a pencil hardness of 4H, scratch resistance of 70g, abrasion resistance of 0.7mg, tensile strength of 44N/mm 2, tear strength of 37N/mm 2, and elongation at break of 174%, which indicates that the ceramic powder has a breathable microporous structure, has better hardness, abrasion resistance and corrosion resistance, and can be loaded in the pore structure of the glass fiber, thereby improving the mechanical strength of the glass fiber.
As can be seen from Table 1, compared with example 1, the modified glass fiber of example 11 has a pencil hardness of 5H, scratch resistance of 72g, abrasion resistance of 0.6mg, tensile strength of 46N/mm 2, tear strength of 39N/mm 2, and elongation at break of 175%, which indicates that the nanocellulose has a certain viscosity, and can increase the adhesion between the ceramic powder and the glass fiber, so that the ceramic powder is stably loaded on the surface of the glass fiber, and further the mechanical property stability of the glass fiber is improved.
Example 14 changes the mass ratio of glass fiber, ceramic powder and nanocellulose, it can be seen from table 1 that the scratch resistance, tensile strength, tear strength and elongation at break performance are significantly better than examples 10-11, but worse than examples 1 and examples 12-13, indicating that the ceramic powder can be loaded on the surface of the glass fiber, the nanocellulose can coat the glass fiber, further improving the adhesion between the glass fiber and the ceramic powder, contributing to improved corresponding performance of the subsequent PU layer.
Examples 15-16 change the mass ratio of talcum powder, modified glass fiber and graphene, and as can be seen from table 1, compared with examples 1-2, the scratch resistance, tensile strength, tear strength and elongation at break performance are obviously better than those of examples 1-2, which shows that the mass ratio of modified talcum powder, modified glass fiber and graphene is further limited, so that the composition with good mechanical strength and tear resistance is obtained, and the modified talcum powder, modified glass fiber and graphene are mutually matched, have synergistic effect, jointly improve the mechanical property of the PU layer, and subsequently help embroidery and are not easy to crack.
As can be seen from Table 1, compared with example 1, the modified talcum powder has a pencil hardness of 3H, scratch resistance of 61g, wear resistance of 1.2mg, tensile strength of 32N/mm 2, tear strength of 28N/mm 2 and elongation at break of 162%, and the modified talcum powder has better stability, wear resistance, toughness, strength and adsorptivity, can enhance the mechanical strength of the system and subsequently improve the corresponding performance of the PU layer.
Comparative example 2 the modified talc powder was replaced with an equivalent amount of talc powder, and it can be seen from Table 1 that compared with example 1, the pencil hardness was 4H, the scratch resistance was 65g, the abrasion resistance was 0.9mg, the tensile strength was 37N/mm 2, the tear strength was 33N/mm 2, and the elongation at break was 170%, showing that the modified talc powder prepared by the present application has better mechanical properties such as strength, tear resistance, etc., and subsequently significantly improved the corresponding properties of the PU layer.
Comparative example 3, without adding modified glass fiber, it can be seen from Table 1 that, compared with example 1, the pencil hardness is 3H, the scratch resistance is 59g, the abrasion resistance is 1.4mg, the tensile strength is 30N/mm 2, the tear strength is 26N/mm 2, and the elongation at break is 160%, showing that the modified glass fiber has better tensile strength, ductility, compressive strength and rigidity, can form a three-dimensional network structure in the system, and increases the cohesive force and flexural rigidity of the system.
Comparative example 4 the modified glass fiber was replaced with an equal amount of glass fiber, and as can be seen from table 1, compared with example 1, the pencil hardness was 4H, scratch resistance was 64g, abrasion resistance was 0.8mg, tensile strength was 36N/mm 2, tear strength was 32N/mm 2, elongation at break was 167%, showing that the modified glass fiber prepared by the present application has better mechanical properties such as strength, tear resistance, etc., and subsequently significantly improved the corresponding properties of the PU layer.
Comparative example 5 was free of added graphene, and it can be seen from table 1 that compared with example 1, the pencil hardness was 3H, the scratch resistance was 63g, the abrasion resistance was 1.0mg, the tensile strength was 34N/mm 2, the tear strength was 30N/mm 2, and the elongation at break was 165%, indicating that the graphene has better mechanical properties, ductility and chemical resistance, and can improve the elasticity, crack resistance and tear resistance of the system, and subsequently improve the corresponding properties of the PU layer.
The present embodiment is only for explanation of the present application and is not to be construed as limiting the present application, and modifications to the present embodiment, which may not creatively contribute to the present application as required by those skilled in the art after reading the present specification, are all protected by patent laws within the scope of claims of the present application.
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| CN106832504A (en) * | 2016-12-06 | 2017-06-13 | 东莞职业技术学院 | A kind of Graphene modified poly ethylene flame-proof composite material and preparation method thereof |
| CN108727916A (en) * | 2018-06-19 | 2018-11-02 | 佛山市高明区首邦化工有限公司 | A kind of antibiotic emulsion paint |
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